{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{1}{cc}}
\hline\hline
                    &\multicolumn{2}{c}{(1)}           \\
                    &\multicolumn{2}{c}{}              \\
                    &           b         &           p\\
\hline
1                   &        0.44         &        0.53\\
2                   &        0.36         &        0.60\\
3                   &        0.98         &        0.21\\
4                   &        0.41         &        0.56\\
5                   &        0.75         &        0.32\\
6                   &        0.64         &        0.39\\
\hline
Observations        &         577         &            \\
\hline\hline
\end{tabular}
}
